Crane or derrick



- (No Model.)4 whew-sheet 1.

' W. J. BENNETTS.

CRANE 0R DERRIGK.

ATnNT OFFICE;

IVILLIM J; bENNETTS, OF BCYRUS, OlllO.

CRANE OR DERRICK.

SPECIFICATION forming part of Letters Patent No. 470,538,

dated March 8,1892.

Application lerl September 30, 1891. Serial No. 407,291. (No model.)

To all whom 151i may concern:

Be it known that I, WILLIAM J. BnNNETTs, a citizen of the United States,residing at Bucyrus, in the county of Crawford and State of Ohio, haveinvented certain new and useful Improvements in Cranes, Derricks, tbc.;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the saine.

My invention has relation to an improved gearingfor transmitting motionfrom a pistonrod to a sluing-circle upon a pivot-post or other part of acrane or the like; `and its novelty resides in the peculiarconstruction, certain novel combinations, and the adaptation of partshereinafter described, and particularly pointed out in the claimsappended.

In the accompanying drawings, Figure l is atop view of apiston-cylinder, piston rod,

sluing-circle, and my improved pulley-gearing for transmitting motion.Fig. 2 is a side elevation of the same, and Figs. 3, 4, 5, and 6 areplan views of modified constructions.

Referring by letter to said drawings, and lnore particularly to Figs. land 2 thereof, A indicates a piston-cylinder of a steam crane, boom, orderrick, and B indicates the pist-onrod, wliich is forked at its freeend or provided with a rigid forked head to afford a bearing for thesheaves O O which have their peripheries grooved and are designed for apurpose presently to be pointed out.

D indicates a horizontal pulley or sluingcircle, which is rigidlyattached to the base or other suitable part of a crane, located in sucha position that the axis of the pistou-rod is parallel to anddistantabouthalf the dialneter of the sheave C from a line tangent tothe periphery of the above-mentioned sluing-circle, which isperipherally grooved, as illustrated, to seat the cable presently to bedescribed.

Situated in about the position illustrated with respect to the pistonrodand the sluing-circle D is a stationary idler-sheave F, around whichtakes the cable Gr, which iinparts motion to the said circle. This cableG, which has one end connected to the pistonhead or at a point adjacentthereto, takes successively around one of the sheaves C or C',

the idler-sheave F, the sluing-circle D, to the periphery of which it isclamped or suitably secured at a suitable point, and the other sheave Cor C' and has its opposite end fixedly connected at a point abreast oradjacent to the periphery of the sluing-circle.

In operation when steam has been admitted into the piston-cylinder toforce the pistonrod outwardly it will be perceived that thesluing-circle will be caused to revolve in thc directionl indicatedbythe arrow a in Fig. l, and when the steam-valve is reversed and thepiston-rod carried inward the circle will be caused to revolve in thedirection of the arrow b in Fig. 1 and resume its normal or primaryposition. scribed intermediate of the piston-rod and the sluing-circlenot only transmits motion from said rod to the circle, but converts thereciprocatory motion of. the rod into a revoluble motion, whereby theemployment of a single cylinder and piston-rod for sluing or swinging acrane is rendered practical .and the disadvantage resulting from thespace taken up by two cylinders and piston-rods is obviated.

In Fig. 3 of the drawings I have illustrated a construction especiallydesigned for use when but a narrow space can be afforded for theplacement of the piston-cylinder, cran-ebase, &c. ln this constructionthe piston-rod B is arranged radially with respect to theSlUvngM-YercleU-D, and two stationary idlersheaves J J' are providedbetween the end of the piston and the sluing-circle to guide the cablein opposite directions, as will be presently perceived. The cable Gr inthis latter The peculiar gearing deconstruction is connected at one endto the cylinder-head or at aV point adjacent thereto, and is thensuccessively carried around one of the sheaves C or C', the idler F, oneof the stationary idler-sheaves J the sluing-circle D, the otherstationary sheave J, one of the sheaves O or C', and is connected at itsopp'o site end at a suitable point, approximately as illustrated.

In Fig. 4: of the drawings I have illustrated another constructiondesigned for use when but a narrow space can be afforded for theplacement of the piston-cylinder, crane-base, dac. In this constructionthe piston-rod B is arranged radially to the sluing-circle D, and

two stationary idler-sheaves J2, which are mounted one upon the other,are provided between the end of the piston and the said sluing-circle toguide the cable in opposite directions. In this latter construction theidler` sheave F is preferably mounted beneath the piston-rod B, asillustrated.

The cable G2 in Fig. 4 is connected at-one end to the cylinder-head orat a point adjacent thereto, and is then successively carried around oneof the sheaves O or O,carred by the piston-rod, the idler F, one of thestationary idIer-sheaves`J2, the sluing-circle D, the other stationarysheave J 2, the other sheave C or C', and is connected at its oppositeend, approximately as illustrated.

In Fig. 5 ofthe drawings I have illustrated a construction to be usedwhen it is desirable to locate the piston-cylinder andv its gearing agreater distance to one side of the sluing circle than could beaccomplished through the medium of the gearing illustrated in Figs. l to4. In this construction four sheaves C2 C3 are mounted in the fork ofthe piston-rod, and in addition to the idler-sheave FL anotheridler-sheave F is provided abreast of the sluing-circle and having itscenter approximately in line with the piston-rod, and still anotheridler-sheave F2 adjacent to the sheave F and either above or below thepiston-rod, with its center approxiniatelyin line with the piston-rod.In this latter construction the cable Gr3 is attached at one end to thecylinder-head or at a point adjacent thereto, and is then successivelycarried around one of the sheaves C2, the idler F2, the other sheave C2,the other idler F, the sluing-circle D, to a suitable point of theperiphery of Which it is attached, one of the sheaves C3, the idler F',the other sheave C3, and is connected at its opposite end at a suitablepoint, approximately as illustrated. 4

In Fig. 6 of the drawings Ihave illustrated a construction which issimilar to that shown in Figs. l and 2, with the exception that insteadof the sheaves in the forked head of the piston-rod being mounted oneupon the other they are mounted in the same plane and are arrangedtandem, as illustrated.

By the gearing and arrangement oi" the cables as described it Will beseen that the crane can only be slued a part of a revolution. When,however, I desire to slue the crane completely around, I pass the cablecompletely around the sluing-circle in addition to the amount shown andattach the ca-y ble to the periphery of said circle at a suitable point.

I-Iavingthus described my invention, WhatI claim, and desire to secureby Letters Patent, is`

l. n agearing for transmitting motion from a piston-rod to asluingcircle,substan tially as described, the combination, with thesluing-circle, the piston-cylinder, the reciprocatory piston-rod, andthe shea-ves carried by the said piston-rod, of the idler-sheavearranged adjacent to the piston-cylinder, and the cable connected at oneend to the pistonhead'and taking successively around 'one ot' 7o thesheaves carried by the piston-rod, the idlersheave, the sluing-circle,and the other sheavc carried by the piston-rod and having its oppositeend txedly connected at asuitable point, substantially as and for thepurpose set forth.

2. I n a gearing. for transmitting motion from a piston-rod to asluing-circle, substantiall y as described, the combination, with thesluing-circle, the piston-cylinder, the reci procatory piston-rod, andthe sheaves carried by the said piston-rod, of the idler-sheave arrangedadjacent to the piston-cylinder, the idler-sheaves arranged adjacent tothe periphcry of lthe sitting-circle, and the cable connet .ed at oneend to the piston-head and taking successively around one of the sheavescarried bythe piston-rod, the idler-sheaveadjacent to thepiston-cylinder, one of the idlersheaves arranged adjacent to thesluing-circle, the sluing-circle, the other idler-sheave arrangedadjacent to the sluing-circle, the other sheave carried by thepiston-rod, and having its opposite end xedly connected ata suitablepoint, substantially as specified.

In testimony whereof I atlix my signature in 95 presence of twoWitnesses.

1 WILLIAM J. BENNET'IS.

Witnesses;

WM. S. NIcHoLLs, A. RINKER.

